CN109574841A - A kind of vegetable oil polyol, preparation method and applications - Google Patents
A kind of vegetable oil polyol, preparation method and applications Download PDFInfo
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- CN109574841A CN109574841A CN201710910666.4A CN201710910666A CN109574841A CN 109574841 A CN109574841 A CN 109574841A CN 201710910666 A CN201710910666 A CN 201710910666A CN 109574841 A CN109574841 A CN 109574841A
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/31—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by introduction of functional groups containing oxygen only in singly bound form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0093—Microreactors, e.g. miniaturised or microfabricated reactors
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/02—Preparation of ethers from oxiranes
- C07C41/03—Preparation of ethers from oxiranes by reaction of oxirane rings with hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
Abstract
The invention discloses a kind of vegetable oil polyols, preparation method and applications.A kind of preparation method of vegetable oil polyol includes the following steps: that Styryl oxide and Ring Opening Reagent are pumped into micro flow field reactor by (1) respectively simultaneously and carries out ring-opening reaction；(2) epoxidized vegetable oil is pumped into the product obtained in micro flow field reactor with step (1) and carries out ring-opening reaction；(3) organic phase in collection step (2) products therefrom obtains vegetable oil polyol after washed, dry.The present invention innovatively passes through two step ring-opening reactions, phenyl ring and hydroxyl are dexterously introduced in the product, simultaneously by miniflow field technology, the continuous operation of technique is realized while guaranteeing that low energy consumption, high efficiency, rate of side effects are low, the vegetable oil polyol of obtained brand new, modest viscosity can effectively improve the intensity and dimensional stability of hard bubble applied to the preparation of polyurethane rigid foam material.
Description
Technical field
The present invention relates to a kind of vegetable oil polyols, preparation method and applications, belong to vegetable oil polyol field.
Background technique
Polyurethane material be isocyanates and polyol reaction and made of one kind with the repetition of carbamate segment
The polymer of structural unit.Wherein the international market of isocyanates is tended towards stability, and two class of predominantly MDI and TDI, supply and demand tend to
It balances and production technology is fairly perfect；And polyurethane polyol is many kinds of, prevailing polyalcohol master currently on the market
The polyethers to be obtained for the hydroxy compounds and aminated compounds and propylene oxide or reacting ethylene oxide of certain higher functionalities
Class polyalcohol, in addition to this there are also polyester polyol, modified grafted polyether polyol etc., these polyol products are all petroleum
Downstream product, dependent resource is strong, price is higher, process safety is poor.Therefore, fossil resources are substituted with organism-based raw material,
Biopolyol is developed, product quality is promoted, reduces dependent resource, lifting process safety, be that polyurethane polyol is ground
Study carefully the important trend with industry development.
Vegetable oil polyol is important renewable resource, and production polyurethane can be reacted with isocyanate ester compound,
It is the good alternative materials of petroleum-based polyols.In recent years synthesize vegetable oil polyol method mainly have: 1) by vegetable oil with
Polyalcohol carries out alcoholysis reaction, generates polyol；2) it using the unsaturated double-bond in ozone oxidation vegetable oil, generates
Polyol with end position hydroxyl；3) it is epoxidized vegetable oil by vegetable oil being oxygenized, then passes through hydrolysis plus hydrogen, methyl esters
Change or the processing such as halogenation generate polyol.
In the method for above-mentioned synthesis vegetable oil polyol, method 3) i.e. epoxy addition method prepare vegetable oil polyol cost compared with
It is low, be the generally acknowledged at present method for being most likely at polyurethane industries among others and realizing industrialization, and usually with method 1) combination.
CN1837180A and CN101139252A is respectively using rapeseed oil and Jatropha curcas oil as primary raw material, through alcoholysis/epoxidation/open loop
Vegetable oil polyol is made in three-step reaction.CN1837181A and CN101108803A is respectively based on rapeseed oil and Jatropha curcas oil
Raw material is wanted, vegetable oil polyol is made through epoxidation/open loop/alcoholysis three-step reaction.CN1907944A is based on epoxy rapeseed oil
Raw material is wanted, is reacted through two step of open loop/alcoholysis and vegetable oil polyol is made.CN101314632A is disclosed " to be prepared using soybean oil
The method of rigid polyurethane foam " includes epoxidation/open loop/four step of alcoholysis/esterification in method.CN101906016A is public
" a kind of rubber seed oil polyalcohol and preparation method thereof " is opened, using rubber seed oil as primary raw material, by epoxidation/open loop two
Step, which is reacted, is made vegetable oil polyol.CN102206154A discloses " a kind of vegetable oil polyol and preparation method thereof ", method
In include two step of epoxidation/open loop react.
The standby vegetable oil polyol of the above patent system is synthesized by batch reactor, and epoxidation and open loop are divided into two steps
Reaction, suffers from the drawback that 1. the reaction time is long；2. energy consumption is higher；3. equipment and automatic control level are low；4. the pair being difficult to avoid that
Reaction causes product quality lower (oligomeric side reaction cause product hydroxyl value is relatively low, viscosity is bigger than normal).
In addition, generated based on epoxidation/open loop or even epoxidation/open loop/alcoholysis or alcoholysis/epoxidation/ring-opening reaction
Vegetable oil polyol, still generally existing hydroxyl value is relatively low, and quality is not high, and compounding certain proportion is still needed to when applied to polyurethane material
The short slab of petrochemical industry polylol.
Summary of the invention
In order to solve in the prior art vegetable oil polyol poor quality, the reaction time is long, energy consumption is higher, lacks more than side reaction etc.
It falls into, the present invention provides a kind of vegetable oil polyol, preparation method and applications.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows:
A kind of preparation method of vegetable oil polyol, includes the following steps:
(1) Styryl oxide and Ring Opening Reagent are pumped into micro flow field reactor respectively simultaneously and carry out ring-opening reaction；
(2) epoxidized vegetable oil is pumped into the product obtained in micro flow field reactor with step (1) and carries out ring-opening reaction；
(3) organic phase in collection step (2) products therefrom obtains vegetable oil polyol after washed, dry.
By the resulting vegetable oil polyol structure novel of the above method, hydroxyl value is high, quality is good, and low energy consumption, side reaction is few,
The vegetable oil polyol that traditional petrochemical industry polylol is applied to polyurethane foamed material can be substituted completely.
The reaction equation reacted in step (1) is as follows:
The reaction equation reacted in step (2) is as follows:
The structural formula of vegetable oil polyol obtained by step (3) is as follows:
In order to further increase reaction efficiency and feed stock conversion, in step (1), Ring Opening Reagent is dissolved with potassium hydroxide
Glycerine, the quality dosage of potassium hydroxide is the 0.5~5% of glycerine quality；The molar ratio of Styryl oxide and glycerine
For 2:(1~1.1).
In order to reduce or remit side reaction, while ensuring to react and go on smoothly, the reaction temperature in step (1), in micro flow field reactor
Degree is 80~130 DEG C, and residence time of material is 3~10min.
In order to guarantee product quality, while ensuring the intensity and dimensional stability of gained polyurethane rigid foam material, step (2)
In, epoxidized vegetable oil is epoxy olive oil, epoxy peanut oil, epoxy rapeseed oil, epoxy cottonseed oil, epoxidized soybean oil, epoxy coconut palm
Seed oil, epoxy palm oil, epoxy sesame oil, epoxy sunflower oil, epoxidized linseed oil, epoxy castor oil, epoxy castor oil, epoxy
At least one of rice bran oil or epoxy corn oil.
In order to guarantee product quality, while the intensity of gained polyurethane rigid foam material is improved, in step (2), Ring Opening Reagent
The molar ratio of glycerine and epoxidized vegetable oil epoxy group is 1:1~4.
In order to reduce or remit side reaction, while ensuring to react and go on smoothly, the reaction temperature in step (2), in micro flow field reactor
Degree is 60~120 DEG C.The product that step (1) obtains pumps out after reaction in first microreactor, and flow is true
Fixed, since two microreactors are cascaded, and the mole dosage of Ring Opening Reagent glycerine also determines, therefore glycerine
Flow determines that, and the total volume of reactor determines, total volume just obtains the residence time divided by the overall flow rate of two streams.
In order to improve reaction efficiency, micro flow field reactor is microchannel module reaction unit.
Micro flow field micro-structured reactor is microchannel module reaction unit；Microchannel module reaction unit includes epoxy
Vinylbenzene storage tank, Ring Opening Reagent storage tank, epoxidized vegetable oil storage tank, the first feed pump, the second feed pump, third feed pump, first
Micro-mixer, the second micro-mixer, the first micro-structured reactor, the second micro-structured reactor, the first temperature control system, the second temperature
Control system and collection of products tank；Styryl oxide storage tank is connected to by the first feed pump with the first micro-mixer；Ring Opening Reagent storage
Tank is connected to by the second feed pump with the first micro-mixer；Epoxidized vegetable oil storage tank passes through third feed pump and the second microring array
Device connection；First micro-mixer, the first micro-structured reactor, the second micro-mixer, the second micro-structured reactor and collection of products
Tank is sequentially communicated by pipeline；First temperature control system is located on the first micro-structured reactor, and it is micro- that the second temperature control system is located at second
On structural response device.
In use, Styryl oxide is pumped into respectively simultaneously after the first micro-mixer mixes with Ring Opening Reagent, it is micro- into first
Structural response device, after products therefrom is mixed with epoxidized vegetable oil into the second micro-mixer after reaction, into second micro- knot
It is reacted in structure reactor, after reaction, products therefrom enters collection of products tank.
The model of above-mentioned first, second micro-mixer is both preferably LH25slit-plate type micro-mixer, and first, second
The model of micro-structured reactor is both preferably Sandwich type microreactor.Select this two reaction component, it is ensured that product
Hydroxyl value is higher, viscosity is lower, and " one high and one low " of the two indexs being advantageously applied for product.
In order to ensure product quality, in step (3), the dilute hydrochloric acid solution that the method for washing is 5% is washed to neutrality, is done
Dry method is dry for anhydrous sodium sulfate.
The vegetable oil polyol being prepared by the preparation method of above-mentioned vegetable oil polyol can be used for hard polyurethane foam material
The preparation of material.
The unmentioned technology of the present invention is referring to the prior art.
The utility model has the advantages that the present invention innovatively passes through two step ring-opening reactions, phenyl ring and hydroxyl are dexterously introduced in the product,
Simultaneously by miniflow field technology, the continuous of technique is realized while guaranteeing that low energy consumption, high efficiency, rate of side effects are low
Change operation, the vegetable oil polyol of obtained brand new, modest viscosity, the preparation applied to polyurethane rigid foam material can have
Effect improves the intensity and dimensional stability of hard bubble.
Detailed description of the invention
Fig. 1 is the schematic diagram of microchannel module reaction unit；Wherein, 1 Styryl oxide storage tank, 2 Ring Opening Reagent storage tanks,
3 first feed pumps, 4 second feed pumps, 5 first micro-mixers, 6 first micro-structured reactors, 7 first temperature control systems, 8 epoxies
Vegetable oil tank, 9 third feed pumps, 10 second micro-mixers, 11 second micro-structured reactors, 12 second temperature control systems, 13 are
Collection of products tank.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
It is as follows to the related assays method of prepared vegetable oil polyol and polyurethane foamed material in following embodiments:
(1) hydroxyl value is surveyed according to GB/T12008.3-2009；
(2) according to GB/T12008.7-2010 viscosimetric；
(3) apparent density of foamed plastics is measured according to GB/T 6343-2009；
(4) according to GB/T 8813-2008 measure rigid foam compressive strength, take foaming vertical direction section be
Compressing surface, compression speed 5mm/min take compressive strength of test value when 10% deflection of sample as material.
Following embodiment equipment therefor is microchannel module reaction unit, as shown in Figure 1, microchannel moduleization reaction dress
It sets including Styryl oxide storage tank, Ring Opening Reagent storage tank, epoxidized vegetable oil storage tank, the first feed pump, the second feed pump, third
Feed pump, the first micro-mixer, the second micro-mixer, the first micro-structured reactor, the second micro-structured reactor, the first temperature control
System, the second temperature control system and collection of products tank；Styryl oxide storage tank is connected by the first feed pump and the first micro-mixer
It is logical；Ring Opening Reagent storage tank is connected to by the second feed pump with the first micro-mixer；Epoxidized vegetable oil storage tank passes through third feed pump
It is connected to the second micro-mixer；First micro-mixer, the first micro-structured reactor, the second micro-mixer, the reaction of the second micro-structure
Device and collection of products tank are sequentially communicated by pipeline；First temperature control system is located on the first micro-structured reactor, the second temperature control system
System is located on the second micro-structured reactor.Styryl oxide is pumped into first with the glycerine dissolved with potassium hydroxide respectively simultaneously
Micro-mixer 5 enters in the first micro-structured reactor 6 after mixing, and the product then obtained and the epoxidized vegetable oil being newly pumped into are same
When be pumped into respectively the second micro-mixer 10 mixing after enter the second micro-structured reactor 11 in, to realize that material can be continuous
Pass through microchannel module reaction unit and while its reaction time is controlled by material flow.Described first, second is micro- mixed
Clutch is LH25slit-plate type (Hastelloy C), is purchased from Ehrfeld Mikrotechnik BTS GmbH；The first,
Second micro-structured reactor is Sandwich type (Hastelloy C), is purchased from Ehrfeld Mikrotechnik BTS GmbH.
Embodiment 1:
It takes the potassium hydroxide for accounting for glycerine quality 0.5% to be dissolved in glycerine, is then pumped into respectively simultaneously with Styryl oxide
Microchannel module reaction unit (micro-mixer is LH25slit-plate type, and micro-structured reactor is Sandwich type),
In, the flow velocity for adjusting two strands of materials makes the molar ratio of Styryl oxide and glycerine in systems be maintained 2:1, at 120 DEG C
Keep 10min；Then it is pumped into epoxidized soybean oil, the open-loop products for obtaining previous step respectively enter simultaneously with epoxidized soybean oil
Microchannel module reaction unit (micro-mixer is LH25slit-plate type, and micro-structured reactor is Sandwich type),
In, the flow velocity for adjusting epoxidized soybean oil makes the molar ratio of the epoxy group of Ring Opening Reagent glycerine and epoxidized soybean oil in systems
1:1.5 reacts at 90 DEG C, finally collects the organic phase in product, washs, is dry to get soybean oil polyol, hydroxyl
Value is 430mgKOH/g, viscosity 7550mPas.
Embodiment 2:
It takes the potassium hydroxide for accounting for glycerine quality 2% to be dissolved in glycerine, is then pumped into respectively simultaneously with Styryl oxide micro-
Path modular reaction unit (micro-mixer is LH25slit-plate type, and micro-structured reactor is Sandwich type),
In, the flow velocity for adjusting two strands of materials makes the molar ratio of Styryl oxide and glycerine in systems be maintained 2:1.1, at 130 DEG C
Lower holding 8min；Then it is pumped into epoxy cottonseed oil, the open-loop products for obtaining previous step respectively enter simultaneously with epoxy cottonseed oil
Microchannel module reaction unit (micro-mixer is LH25slit-plate type, and micro-structured reactor is Sandwich type),
In, the flow velocity for adjusting epoxy cottonseed oil makes the molar ratio of the epoxy group of Ring Opening Reagent glycerine and epoxy cottonseed oil in systems
It for 1:1, is reacted at 110 DEG C, finally the organic phase in product is collected, is washed, is dry to get cottonseed oil polyalcohol, hydroxyl
Value is 370mgKOH/g, viscosity 7050mPas.
Embodiment 3:
It takes the potassium hydroxide for accounting for glycerine quality 3% to be dissolved in glycerine, is then pumped into respectively simultaneously with Styryl oxide micro-
Path modular reaction unit (micro-mixer is LH25slit-plate type, and micro-structured reactor is Sandwich type),
In, the flow velocity for adjusting two strands of materials makes the molar ratio of Styryl oxide and glycerine in systems be maintained 2:1.05, at 80 DEG C
Lower holding 5min；Then it is pumped into epoxy peanut oil, the open-loop products for obtaining previous step respectively enter simultaneously with epoxy peanut oil
Microchannel module reaction unit (micro-mixer is LH25slit-plate type, and micro-structured reactor is Sandwich type),
In, the flow velocity for adjusting epoxy peanut oil makes the molar ratio of the epoxy group of Ring Opening Reagent glycerine and epoxy peanut oil in systems
It for 1:2, is reacted at 70 DEG C, finally the organic phase in product is collected, is washed, is dry to get peanut oil polyalcohol, hydroxyl
Value is 377mgKOH/g, viscosity 8150mPas.
Embodiment 4:
It takes the potassium hydroxide for accounting for glycerine quality 1% to be dissolved in glycerine, is then pumped into respectively simultaneously with Styryl oxide micro-
Path modular reaction unit (micro-mixer is LH25slit-plate type, and micro-structured reactor is Sandwich type),
In, the flow velocity for adjusting two strands of materials makes the molar ratio of Styryl oxide and glycerine in systems be maintained 2:1, at 90 DEG C
Keep 9min；Then it is pumped into epoxy rapeseed oil, the open-loop products for obtaining previous step respectively enter micro- simultaneously with epoxy rapeseed oil
Path modular reaction unit (micro-mixer is LH25slit-plate type, and micro-structured reactor is Sandwich type),
In, the flow velocity for adjusting epoxy rapeseed oil makes the molar ratio of the epoxy group of Ring Opening Reagent glycerine and epoxy rapeseed oil in systems
1:3 reacts at 120 DEG C, finally collects the organic phase in product, washs, is dry to get vegetable seed oil polyalcohol, hydroxyl value
For 410mgKOH/g, viscosity 7750mPas.
Embodiment 5:
100 parts of the soybean oil polyol prepared in Example 1 is stablized using one-step method free foaming technique with foam
0.5 part of agent AK-8803 (Nanjing Mei Side), cyclohexylamine (Jiangdu great river chemical industry, 0.5 part), 1 part of water, isocyanates12 parts of PM-200 (Yantai Wanhua, isocyanate index 105) and foaming agent pentamethylene (Foshan U.S. dragon), instead
It should foam, hard polyurethane foams, apparent density 39.2kg/m can be prepared3, vertical compressive strength is
222kPa。
Embodiment 6:
100 parts of the cottonseed oil polyalcohol prepared in Example 2 is stablized using one-step method free foaming technique with foam
0.5 part of agent AK-8803 (Nanjing Mei Side), 0.5 part of cyclohexylamine (Jiangdu great river chemical industry), 1 part of water, isocyanates12 parts of PM-200 (Yantai Wanhua, isocyanate index 105) and foaming agent pentamethylene (Foshan U.S. dragon) are anti-
It should foam, hard polyurethane foams, apparent density 37.1kg/m can be prepared3, vertical compressive strength is
190kPa。
Embodiment 7:
100 parts of the peanut oil polyalcohol prepared in Example 3 is stablized using one-step method free foaming technique with foam
0.5 part of agent AK-8803 (Nanjing Mei Side), 0.5 part of cyclohexylamine (Jiangdu great river chemical industry), 1 part of water, isocyanates12 parts of PM-200 (Yantai Wanhua, isocyanate index 105) and foaming agent pentamethylene (Foshan U.S. dragon) are anti-
It should foam, hard polyurethane foams, apparent density 37.9kg/m can be prepared3, vertical compressive strength is
198kPa。
Embodiment 8:
100 parts of the vegetable seed oil polyalcohol prepared in Example 1 is stablized using one-step method free foaming technique with foam
0.5 part of agent AK-8803 (Nanjing Mei Side), 0.5 part of cyclohexylamine (Jiangdu great river chemical industry), 1 part of water, isocyanates12 parts of PM-200 (Yantai Wanhua, isocyanate index 105) and foaming agent pentamethylene (Foshan U.S. dragon) are anti-
It should foam, hard polyurethane foams, apparent density 38.4kg/m can be prepared3, vertical compressive strength is
210kPa。
Claims (10)
1. a kind of preparation method of vegetable oil polyol, which comprises the steps of:
(1) Styryl oxide and Ring Opening Reagent are pumped into micro flow field reactor respectively simultaneously and carry out ring-opening reaction；
(2) epoxidized vegetable oil is pumped into the product obtained in micro flow field reactor with step (1) and carries out ring-opening reaction；
(3) organic phase in collection step (2) products therefrom obtains vegetable oil polyol after washed, dry.
2. preparation method according to claim 1, which is characterized in that in step (1), Ring Opening Reagent is dissolved with hydroxide
The glycerine of potassium, the quality dosage of potassium hydroxide are the 0.5~5% of glycerine quality；Mole of Styryl oxide and glycerine
Than for 2:(1~1.1).
3. preparation method according to claim 1 or 2, which is characterized in that anti-in micro flow field reactor in step (1)
Answering temperature is 80~130 DEG C, and residence time of material is 3~10min.
4. preparation method according to claim 1 or 2, which is characterized in that in step (2), epoxidized vegetable oil is epoxy olive
Olive oil, epoxy peanut oil, epoxy rapeseed oil, epoxy cottonseed oil, epoxidized soybean oil, epoxy coconut oil, epoxy palm oil, epoxy sesame
In sesame oil, epoxy sunflower oil, epoxidized linseed oil, epoxy castor oil, epoxy castor oil, nontoxic plasticizer or epoxy corn oil extremely
Few one kind.
5. preparation method according to claim 2, which is characterized in that in step (2), Ring Opening Reagent glycerine and epoxy are planted
The molar ratio of object oil epoxy group is 1:1~4.
6. preparation method according to claim 1 or 2, which is characterized in that anti-in micro flow field reactor in step (2)
Answering temperature is 60~120 DEG C.
7. preparation method according to claim 1 or 2, which is characterized in that micro flow field micro-structured reactor is microchannel mould
Block reaction unit；Microchannel module reaction unit includes Styryl oxide storage tank, Ring Opening Reagent storage tank, epoxidized vegetable oil storage
Tank, the first feed pump, the second feed pump, third feed pump, the first micro-mixer, the second micro-mixer, the reaction of the first micro-structure
Device, the second micro-structured reactor, the first temperature control system, the second temperature control system and collection of products tank；Styryl oxide storage tank passes through
First feed pump is connected to the first micro-mixer；Ring Opening Reagent storage tank is connected to by the second feed pump with the first micro-mixer；Ring
Oxygen vegetable oil tank is connected to by third feed pump with the second micro-mixer；First micro-mixer, the first micro-structured reactor,
Two micro-mixers, the second micro-structured reactor and collection of products tank are sequentially communicated by pipeline；First temperature control system is located at first
On micro-structured reactor, the second temperature control system is located on the second micro-structured reactor.
8. preparation method according to claim 1 or 2, which is characterized in that in step (3), the method for washing be 5% it is dilute
Hydrochloric acid solution is washed to neutrality, and dry method is dry for anhydrous sodium sulfate.
9. the vegetable oil that the preparation method of the vegetable oil polyol as described in any one of claim 1~8 is prepared is more
First alcohol.
10. vegetable oil polyol as claimed in claim 9 is preparing the application in polyurethane rigid foam material.
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| CN110746299B (en) * | 2019-09-30 | 2021-01-26 | 南京工业大学 | High-quality vegetable oil polyol and preparation method and application thereof |
| CN111440063A (en) * | 2020-05-09 | 2020-07-24 | 惠生(中国)投资有限公司 | Production device and production method of liquid crystal polymer precursor acetylated monomer and application of production device |
| CN111440063B (en) * | 2020-05-09 | 2023-08-22 | 惠生(中国)投资有限公司 | Production device and production method of liquid crystal polymer precursor acetylated monomer and application of production device |
| CN114672012A (en) * | 2022-03-16 | 2022-06-28 | 中国石油化工股份有限公司 | Method for preparing polyether polyol based on micro mixer and micro-channel reactor |
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